// JavaScript Document



function trim (stringToTrim)

{

	return stringToTrim.replace(/^\s+|\s+$/g,"");

}

function ltrim (stringToTrim)

{

	return stringToTrim.replace(/^\s+/,"");

}

function rtrim (stringToTrim)

{

	return stringToTrim.replace(/\s+$/,"");

}



function isEmpty(s)

{

	s1 = s;

	return( (s1 == null) || (s1.length == 0) )

}



function isEmailAddr(email)

{

	var check = /^.+@.+\..{2,4}$/;

	

	if ( check.test(email) )

		return true;

	else

		return false;

}



function isChar (sText)

{

	var validChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";

	var isChar=true;

	var Char;



	for (n = 0; n < sText.length && isChar == true; n++) 

	{

		Char = sText.charAt(n); 

		if (validChars.indexOf(Char) == -1) 

			isChar = false;

	}



	return isChar;

}



function isNumber (sText)

{

	var validChars = "0123456789";

	var isChar=true;

	var Char;



	for (n = 0; n < sText.length && isChar == true; n++) 

	{

		Char = sText.charAt(n); 

		if (validChars.indexOf(Char) == -1) 

			isChar = false;

	}



	return isChar;

}



function isFloatNumber (sText)

{

	var validChars = "0123456789.,";

	var isChar=true;

	var hasDight=false;

	var Char;



	for (n = 0; n < sText.length && isChar == true; n++) 

	{

		Char = sText.charAt(n); 

		if (validChars.indexOf(Char) == -1)

			return false;

		if (Char == ".")

		{

			if (hasDight == true)

				return false;

			else

				hasDight=true;

		}

	}



	return isChar;

}





function isDate(dateStr) {

	var datePat = /^(\d{4})(\/|-)(\d{1,2})(\/|-)(\d{1,2})$/;

	var matchArray = dateStr.match(datePat); // is the format ok?

	

	if (matchArray == null) {

		//alert("Please enter date as either mm/dd/yyyy or mm-dd-yyyy.");

		return false;

	}

	

	month = matchArray[3]; // p@rse date into variables

	day = matchArray[5];

	year = matchArray[1];

	

	if (month < 1 || month > 12) { // check month range

		//alert("Month must be between 1 and 12.");

		return false;

	}

	

	if (day < 1 || day > 31) {

		//alert("Day must be between 1 and 31.");

		return false;

	}

	

	if ((month==4 || month==6 || month==9 || month==11) && day==31) {

		//alert("Month "+month+" doesn`t have 31 days!")

		return false;

	}

	

	if (month == 2) { // check for february 29th

		var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));

		if (day > 29 || (day==29 && !isleap)) {

			//alert("February " + year + " doesn't have " + day + " days!");

			return false;

		}

	}

	return true; // date is valid

}



function validateURL(txtURL)

{

	var j = new RegExp();

	j.compile("^[A-Za-z]+://[A-Za-z0-9-]+\.[A-Za-z0-9]+");

	if (!j.test(txtURL))

		return false;

	else

		return true;

}